NISAR Satellite | NASA–ISRO Dual-Frequency Radar Mission | Current Affairs 2025

🛰️ NISAR (NASA–ISRO Synthetic Aperture Radar) is the world’s first dual-frequency radar satellite designed to monitor Earth’s surface with unmatched precision.

✅ Key Highlights:
• Orbit: Sun-synchronous near-polar, ~747 km, 12-day repeat cycle
• Bands Used: L-band (1.2 GHz, NASA) + S-band (3.2 GHz, ISRO)
• First-of-its-kind: Dual-frequency SAR in one mission
• Purpose: Observes Earth’s land & ice changes, crustal deformation (earthquakes, volcanoes, landslides), glacier & polar ice dynamics, biomass & agriculture changes, soil moisture, wetlands & coasts

🎯 Critical for climate change studies, disaster management, and Earth system science.

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#NISAR #ISRO #NASA #RadarMission #EarthObservation #CurrentAffairs2025 #UPSC #UPPCS #SSC #DefenceExams #LearnThroughCurrentAffairs

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